I correct myself. I don't need to use it on Excel in a strict sense. I'm using Excel just to make calculations on the fly. In the end I'll need to add the formula in a software I developed to manage and monitor all my rigs remotely and automatically.

Right now I am already "pinging" services like Whattomine, Mastenodes.online etc. to perform automatic actions but Whattomine gives values for a very small amount of altcoins. I need to apply the same formula to all other coins so that I can use the auto-switch to mine masternodes depending on my priority list, the amount of nodes I want and of course the days needed.